First, add 1 point into all 4 skills: Lightning Punch, Flash, Lightning Element, and Electrified. Max Lighting Element first for the extra duration, chance for Lightning Buff, and amount of defense ignored with the Lightning Buff. 1 point into your attack skills should suffice for now. Afterward, max Electrified for the speed and jump boost and the additional Lightning Buff chance. Next, raise Lightning Punch to 19, since it's hardly used after 1st job. Finally, max Flash. Neither skill is used much later on, so you can feel free to max Lightning Punch instead of Flash.

First, you'll want to add 1 point into Shark Sweep (a new attack skill), Tidal Crash (a rush skill), Knuckle Mastery (stability), and Lightning Boost (for the extra Lightning Buff stack and 1 Weapon Attack). Ideally, you'll want to max Mastery first to have more stable damage. When you get to 5 Mastery, add 6 points into Booster to have two minutes of increased attack speed. Next, max Mastery, and then Booster. Afterwards, max Lightning Boost for the extra Lightning Buff chance and Weapon Attack. Next, max Gains for extra strength. Now it's up to you whether or not you want to max Shark Sweep or Tidal Crash, but it's recommended to max Tidal Crash for more utility.

Congratulations on 3rd job! Once you receive it, you'll want to add 1 point into Ascension, Thunder, Gale, and Lightning Lord. With Ascension and Thunder, you receive a new training style. Gale gives you a nice damage increase for every accumulated Lightning Buff. Lightning Lord gives an additional 11 Weapon Attack at level 1, and gives you an additional Lightning Buff to accumulate (total: 4 now), as well as the rate of accumulating it. First, you'll want to max Lightning Lord for the extra weapon attack and Lightning Buff chance. Next, you'll want to max Link Mastery for the extra damage dealt from linking skills. Afterward, you'll want to max Ironclad for the 10% damage reduction and 5% extra damage. Next, you get to decide whether to max Ascension and leave Thunder at 14, or vice versa. After, max Gale for the damage boost from accumulated Lightning Buffs (note, it MUST be maxed for Typhoon in 4th job), and finally, Seawall must be maxed for extra Status and Elemental Resistance.
Note: Alternatively, you could leave both Ascension and Thunder at 17.

When you unlock Hyper Skills, you gain new skill points every 10 levels, varying based on what level it is that you hit. Y5 points in Passive Skill Boosts (henceforth referred to as P), and 3 points in Active Skills (A).

Level 140: P: Gale - Reinforce (unlocked at 143)

Level 150: A: Primal Bolt

Level 160: P: Thunderbolt - Reinforce

Level 170: A: Deep Rising

Level 180: P: Gale - Extra Strike (unlocked at 183)

Level 190: P: Thunderbolt - Extra Strike

Level 200: P: Gale - Spread, A: Glory of the Guardians

Note: You can wait until 200 to add Hyper Health, and add Hyper Critical at 198 instead.